US4069061A
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Ceramics having nonlinear voltage characteristics
Assignee: Fuji Electric Co Ltd
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Filing: 1976-06-30
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Granted: 1978-01-17
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Expires: 1996-06-30
Abstract
Abstract Ceramics having nonlinear voltage characteristics in which (1) zinc oxide is used as a main component and (2) praseodymium, (3) one or more of magnesium or calcium, and (4) cobalt are added thereto as subcomponents, in elemental form or as a compound thereof, in an amount of from about 0.08 to about 10.0 atomic % for praseodymium, from about 0.08 to about 10.0 atomic % for the one or more of magnesium or calcium, and from about 0.1 to about 8.0 atomic % for the cobalt, each calculated as praseodymium, magnesium or calcium and cobalt.
Inventors
- 👤 Ikuo Nagasawa
- 👤 Kazuo Mukae
- 👤 Takashi Ishii
- 👤 Koichi Tsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:32
CPC Classifications
C; C04; C04B; C04B35/00; H; H01; H01C; H01C7/00; H01C7/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
Ceramic compositions consisting essentially of (1) from about 0.08 to about 10.0 atomic % Pr; (2) from about 0.08 to about 10.0 atomic % Mg or from about 0.08 to about 10.0 atomic % Ca; (3) from about 0.1 to about 8.0 atomic % Co; balance ZnO.
Claim 2
Dependent Claim
47 words
Ceramic compositions consisting essentially of (1) from about 0.08 to about 10.0 atomic % Pr; (2) from about 0.08 to about 10.0 atomic % Mg or from about 0.08 to about 10.0 atomic % Ca; (3) from about 0.1 to about 8.0 atomic % Co; balance ZnO.
Claim 3
Dependent Claim
15 words
The ceramic composition of claim 1 containing about 0.08 to about 10.0 atomic % Mg.
Claim 4
Dependent Claim
15 words
The ceramic composition of claim 1 containing about 0.08 to about 10.0 atomic % Ca.
Claim 5
Dependent Claim
22 words
The ceramic composition of claim 1 containing Mg and Ca in a combined amount of about 0.08 to about 100.0 atomic %.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |